(XML schema) in Listing 4, customer3.xml (XML data) in Listing 12.

xsd (xml Schema)，如清单4所示；customer3 . xml (xml数据)，如清单12所示。

youdao

It handles data in any format — XML, non-XML, or mixed.

它可以处理任意格式的数据——XML、非xml或两者混合。

youdao

The question that must be answered is no longer "Why XML?" but "Why not XML?" XML is the default choice for data.

必须回答的问题不再是“为什么用XML”而是“为什么不用XML”，XML已成为默认的数据格式。

youdao

Complicated configurations files gave way to standardized XML, which then was replaced by point-and-click configuration.

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SGML, like XML, is a metalanguage -- a language used for defining other languages.

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